Front-wheel-drive vehicle having a chassis that folds to create a protective, carry-on casing

ABSTRACT

The teachings provided herein are generally directed to compact vehicle drive mechanisms that can be used in the design of a foldable, carry-on vehicle. The compact drive mechanisms presented herein, for example, have contributed to the advent of the compact, carry-on bicycles set-forth in the teachings which include drive-and-steering units and drive-and-chassis units.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.13/229,648, filed on Sep. 9, 2011, which is herein incorporated byreference in its entirety.

BACKGROUND

1. Field of the Invention

The teachings provided herein are generally directed to compact vehicledrive mechanisms that can be used in the design of a foldable, carry-onvehicle.

2. Description of the Related Art

Vehicles used for transportation generally all expose the user to sometransfer of mechanical lubricants from the vehicle to the user, such asoil and grease, for example. Automobiles have generally done a good jobof reducing the user's exposure to such lubricants by enclosing areas ofthe automobile that introduce this problem to the user. Other vehiclesstill create this problem, as their design inherently exposes the userto such lubricants.

Bicycles, for example, are almost exclusively driven by chain sets, andthe conventional lightweight construction of bicycles limit the extentto which the user can be protected from the chain sets and stillmaintain the desired weight and performance of the bicycle.

Moreover, the use of bicycles is limited by the ability to carry andstore the bicycles. For example, a user of mass transit, such as trains,buses, taxi's, and even airplanes and boats, needs to carry-on thebicycle in some way, and not all mass transit systems can accepttraditional bicycles. Folding bicycles exist, but they still remaingreasy, large, and heavy, as well as introduce shear and pinch pointsthat can be dangerous to the user.

Accordingly, and for at least the above reasons, one of skill wouldappreciate a vehicle having a drive mechanism that is (i) compact, (ii)at least substantially enclosed, (iii) clean, and (iv) generallyshielded from contact by the user during normal use. Moreover, one ofskill will appreciate a folding bicycle that collapses into its ownchassis, with little to no nip, pinch and shear points, in acomplementary configuration to form a compact, carry-on bicycle, thechassis functioning as a protective, carry-on casing. Such a foldingbicycle will be considered particularly useful in a size that is similarto a piece of carry-on luggage.

SUMMARY

The teachings provided herein are generally directed to compact vehicledrive mechanisms can be used in the design of a foldable, carry-onvehicle. The compact drive mechanisms presented herein, for example,have contributed to the advent of the compact, carry-on bicyclesset-forth in the teachings which include drive-and-steering units anddrive-and-chassis units.

In some embodiments, for example, the teachings are directed to acompact, combination drive-and-steering unit for a vehicle, the unithaving a shared rotational space comprising a portion of a driveassembly and a portion of a steering assembly. The drive assembly caninclude a crankshaft having a crank axis that rotates in a fixedposition relative to a chassis of a vehicle powered by the crankshaft.The crankshaft can be in an operable communication with a spool-shafthaving a drive axis, the spool-shaft in an operable communication with adrive member. The drive member can be in an operable communication witha wheel assembly having a wheel, the drive assembly transferring a powerfrom the crankshaft to drive the wheel. The steering assembly caninclude a strut in an operable communication with the wheel assembly, asteering axle in an operable communication with the strut, and asteering member in an operable communication with the steering axle. Thesteering axle can have a steering axis that is concentric to the driveaxis of the spoolshaft in the shared rotational space, the spoolshaftcircumscribing at least a portion of the steering axle. The steeringaxle can rotate freely, or substantially freely, within the spoolshaft,such that the crankshaft rotates in the fixed position independent, orsubstantially independent, of a rotation of the steering axle. Theshared rotational space creates a compact, combinationdrive-and-steering unit for the vehicle.

It should be appreciated that the drive member, in the embodimentsset-forth herein, can be any operable connection that transfers power tothe wheel. In some embodiments, the drive member comprises a linkshaft.In some embodiments, the drive member comprises a chain. And, in someembodiments, the drive member comprises a belt.

It should be appreciated that the steering member, in the embodimentsset-forth herein, can be any means for directing a steering of thevehicle. In some embodiments, the steering member is a handlebar.

It should be appreciated that the vehicle, in the embodiments set-forthherein, can be any vehicle that can benefit from the teachings providedherein. In some embodiments, the vehicle is a bicycle. And, in someembodiments, the vehicle is a folding bicycle.

It should be appreciated that a strut can be a structural member that isused to operably attach a wheel assembly to a vehicle chassis. One ofskill will appreciate that a strut can include a fork. Moreover, in someembodiments, a strut can comprise a unifork.

The drive-and-steering unit can be powered using any means known to oneof skill. For example, the drive-and-steering unit can further comprisean electric motor in an operable communication with the crankshaft.Likewise, the teachings are also directed to a compact, combinationdrive-and-steering unit for a pedal-powered vehicle. In theseembodiments, the drive-and-steering unit can include a shared rotationalspace, the space comprising a portion of a drive assembly and a portionof a steering assembly. The drive assembly can include a pair of pedalsattached to a pair of crankarms, the pair of crankarms attached to acrankshaft, the crankshaft having a crank axis that rotates in a fixedposition under a pedal power relative to a chassis. The crankshaft canbe in an operable communication with a spool-shaft having a drive axis,the spool-shaft in an operable communication with a drive member, andthe drive member in an operable communication with a wheel assemblyhaving a wheel. In these embodiments, the drive assembly transfers thepedal power from the crankshaft to drive the wheel. The steeringassembly can include a strut in an operable communication with the wheelassembly, a steering axle in an operable communication with the strut,and a steering member in an operable communication with the steeringaxle. The steering axle can have a steering axis that is concentric tothe drive axis of the spoolshaft in the shared rotational space, thespoolshaft circumscribing at least a portion of the steering axle. Thesteering axle can rotate freely, or substantially freely, within thespoolshaft, such that the crankshaft rotates in the fixed positionindependent, or substantially independent, of a rotation of the steeringaxle. And, the shared rotational space can create a compact, combinationdrive-and-steering unit for the pedal-powered vehicle.

The compact drive mechanism can also include a portion of the chassis.In some embodiments, for example, the teachings are directed to acompact, combination drive-and-chassis unit for a vehicle. The unitcomprises a shared chassis space comprising at least a portion of achassis assembly that encloses at least a substantial portion of a driveassembly. The drive assembly includes a crankshaft having a crank axis,the crankshaft in an operable communication with a drive member. Thedrive member can be in an operable communication with a wheel assemblyhaving a wheel, the drive assembly transferring a power from thecrankshaft to drive the wheel. The portion of the chassis assembly canfunction as a protective casing for the substantial portion of the driveassembly, the substantial portion of the drive assembly comprising thecrankshaft and at least a substantial portion of the drive member. Thedrive member can have at least one fixably rotatable pivot pointcorresponding to a fixably rotatable joint in the chassis assembly forat least one re-direction of the power from the crankshaft to the wheel.And, the shared chassis space can create a compact, combinationdrive-and-chassis unit for the vehicle.

The chassis can further comprise a rear strut having a proximal end anda distal end, the proximal end attaching to the remainder of the chassisat a rotatably-lockable rear strut pivot at the fixably rotatable joint,and the distal end operably attaching to the wheel assembly.

As with the combined drive-and-steering unit above, it should beappreciated that the drive member, in the embodiments set-forth herein,can be any operable connection that transfers power to the wheel. Insome embodiments, the drive member comprises a linkshaft. In someembodiments, the drive member comprises a chain. And, in someembodiments, the drive member comprises a belt. Likewise, as with thecombined drive-and-steering unit above, it should be appreciated thatthe steering member, in the embodiments set-forth herein, can be anymeans for directing a steering of the vehicle. In some embodiments, thesteering member is a handlebar. Likewise, as with the combineddrive-and-steering unit above, the vehicle can be any vehicle that canbenefit from the combination drive-and-chassis unit. In someembodiments, the vehicle is a bicycle. And, in some embodiments, thevehicle is a folding bicycle. Moreover, as with the combineddrive-and-steering unit above, it should be appreciated that a strut canbe a structural member that is used to operably attach a wheel assemblyto a vehicle chassis. Again, one of skill will appreciate that a strutcan include a fork and, in some embodiments, a strut can comprise aunifork.

As with the drive-and-steering unit, the drive-and-chassis unit can bepowered using any means known to one of skill. For example, thedrive-and-chassis unit can further comprise an electric motor in anoperable communication with the crankshaft. Likewise, the teachings arealso directed to a compact, combination drive-and-chassis unit for apedal-powered vehicle. In these embodiments, the drive-and-chassis unitcan comprise a shared chassis space comprising at least a portion of achassis assembly that encloses at least a substantial portion of a driveassembly. The drive assembly can include a pair of pedals attached to apair of crankarms, the pair of crankarms attached to a crankshaft. Thecrankshaft can have a crank axis and be in an operable communicationwith a drive member, the drive member in an operable communication witha wheel assembly having a wheel. And, the drive assembly can transfer apedal power from the crankshaft to drive the wheel. In theseembodiments, the portion of the chassis assembly can function as aprotective casing for the substantial portion of the drive assembly, thesubstantial portion of the drive assembly comprising the crankshaft andat least a substantial portion of the drive member. The drive member canhave at least one fixably rotatable pivot point corresponding to afixably rotatable joint in the chassis assembly for at least onere-direction of the power from the crankshaft to the wheel. And, theshared chassis space can create a compact, combination drive-and-chassisunit for the vehicle.

The power can be transferred from the crank to the wheel through a chainset. As such, in some embodiments, the teachings are directed to acompact, combination drive-and-chassis unit for a pedal-powered vehiclethat includes a chain set. In these embodiments, a shared chassis spacecomprises at least a portion of a chassis assembly that encloses atleast a substantial portion of a drive assembly. The drive assembly caninclude a pair of pedals attached to a pair of crankarms, the pair ofcrankarms attached to a crankshaft. The crankshaft can have a crank axisand a first sprocket. The crankshaft can be in an operable communicationwith a chain set having a roller chain and a second sprocket having asecond sprocket axis, the chain set in an operable communication with awheel assembly having a wheel, and a third sprocket. And, the driveassembly can transfer a pedal power from the crankshaft to drive thewheel. In some embodiments, the portion of the chassis assembly canfunction as a protective casing for the substantial portion of the driveassembly, the substantial portion of the drive assembly comprising thecrankshaft and at least a substantial portion of the drive member. Thechain set can have a fixably rotatable pivot point at the secondsprocket axis corresponding to a fixably rotatable joint in the chassisassembly for a re-direction of the pedal power from the crankshaft tothe second sprocket, and from the second sprocket to the wheel. And, theshared chassis space can create a compact, combination drive-and-chassisunit for the vehicle.

The teachings are also directed to any of a variety of bicycles havingthe features discussed above. In some embodiments, the teachings aredirected to a folding bicycle with an enclosed, front-wheel shaft-drive.These embodiments can have a shared rotational space including (i) aportion of a drive assembly and (ii) a portion of a steering assembly,as well as a folding chassis including (iii) a rotatably-lockable frontstrut supporting a front wheel assembly having a front wheel, and (iv) arotatably-lockable rear strut supporting a rear wheel assembly having arear wheel. The drive assembly can include a pair of pedals attached toa pair of crankarms, the pair of crankarms attached to a crankshaft. Thecrankshaft can have a crank axis that rotates under a pedal power in afixed position in the chassis, the crankshaft in an operablecommunication with a spool-shaft having a drive axis. The spool-shaftcan be in an operable communication with a drive member, and the drivemember can be in an operable communication with the front wheel. Thedrive assembly can transfer the pedal power from the crankshaft to drivethe front wheel. The steering assembly can include the front strut in anoperable communication with the front wheel assembly, a steering axle inan operable communication with the front strut, and a steering member inan operable communication with the steering axle. The steering axle canhave a steering axis that is concentric to the drive axis of thespoolshaft in the shared rotational space, the spoolshaft circumscribingat least a portion of the steering axle. The steering axle can rotatefreely, or substantially freely, within the spoolshaft, such that thecrankshaft rotates in the fixed position independent, or substantiallyindependent, of a rotation of the steering axle. The front strut canhave a proximal end and a distal end, the proximal end of the frontstrut attaching to the chassis at a rotatably-lockable front strutpivot. The rear strut can have a proximal end and a distal end, theproximal end of the rear strut attaching to the chassis at arotatably-lockable rear strut pivot. And, the shared rotational spacecan create a compact, combination drive-and-steering unit for thepedal-powered vehicle.

In some embodiments, the front strut can be releasably-lockable in aplurality of positions. And, in some embodiments, the rear strut can bereleasably-lockable in a plurality of positions. In some embodiments,the front strut is a unifork, the rear strut is a unifork that iscomplementary in shape to the front strut, such that the front strut,the front wheel assembly, the rear strut, and the rear wheel assemblycan collapse into the chassis in a complementary configuration to form acompact, carry-on bicycle.

In some embodiments, the chassis functions as a protective casing forthe crankshaft, the spool-shaft, and the drive member during anoperation of the bicycle. And, in some embodiments, the chassisfunctions as a protective casing for the crankshaft, the spool-shaft,the drive member, the front strut, the front wheel assembly, the rearstrut, and the rear wheel assembly during a collapse of the bicycle.

In some embodiments, the steering member can be a collapsibly lockablehandlebar. And, in some embodiments, the bicycle can further comprise acollapsibly lockable seat. Moreover, in some embodiments, the bicyclecan weigh less than 10 pounds.

Likewise, a bicycle can have the drive-and-chassis unit. As such, theteachings are also directed to a compact, carry-on bicycle with anenclosed, drive assembly. In these embodiments, the bicycle can includea shared chassis space comprising (i) at least a portion of a chassisassembly that encloses (ii) at least a substantial portion of a driveassembly, as well as a folding chassis including (iii) arotatably-lockable front strut supporting a front wheel assembly havinga front wheel, and (iv) a rotatably-lockable rear strut supporting arear wheel assembly having a rear wheel. The drive assembly can includea pair of pedals attached to a pair of crankarms, the pair of crankarmsattached to a crankshaft. The crankshaft can have a crank axis thatrotates under a pedal power in a fixed position in the chassis, thecrankshaft in an operable communication with a spool-shaft having adrive axis. The spool-shaft can be in an operable communication with adrive member, and the drive member in an operable communication with thefront wheel, the drive assembly transferring the pedal power from thecrankshaft to drive the front wheel. The portion of the chassis assemblycan function as a protective casing for the substantial portion of thedrive assembly, the substantial portion of the drive assembly comprisingthe crankshaft and at least a substantial portion of the drive member.The drive member can have a fixably rotatable pivot point correspondingto a fixably rotatable joint in the chassis assembly for a re-directionof the pedal power from the crankshaft to the pivot point and from thepivot point to the wheel. The front strut can have a proximal end and adistal end, the proximal end of the front strut attaching to the chassisat a rotatably-lockable front strut pivot. The rear strut can have aproximal end and a distal end, the proximal end of the rear strutattaching to the chassis at a rotatably-lockable rear strut pivot. And,the shared chassis space can create a compact, combinationdrive-and-steering unit for the pedal-powered vehicle.

In some embodiments, the front strut can be releasably-lockable in aplurality of positions. Likewise, in some embodiments, the rear strutcan be releasably-lockable in a plurality of positions. The result ofthe releasably-lockable struts is a variability in wheel base and/orheight of the bicycle.

As with the bicycle having the combination drive-and-steering unit, thefront strut can be a unifork, and the rear strut can be a unifork thatis complementary in shape to the front strut, such that the front strut,the front wheel assembly, the rear strut, and the rear wheel assemblycollapse into the chassis in a complementary configuration to form acompact, carry-on bicycle. Likewise, the chassis can function as aprotective casing for the crankshaft, the drive member, the front strut,the front wheel assembly, the rear strut, and the rear wheel assemblyduring a collapse of the bicycle.

BRIEF DESCRIPTION OF THE FIGURES

FIGS. 1A-1C illustrate a front-wheel drive, drive-and-steering unit,according to some embodiments.

FIGS. 2A and 2B illustrate variations of the drive-and-steering unitmechanism, according to some embodiments.

FIG. 3 illustrates a drive-and-steering unit in a bicycle, according tosome embodiments.

FIGS. 4A-4C illustrate a bicycle having a shared chassis as adrive-and-chassis unit, according to some embodiments.

FIGS. 5A and 5B illustrate a short-strut, front-wheel drive bicyclehaving a shared rotational space, according to some embodiments.

FIGS. 6A-6D illustrate a long-strut, unifork-type, front-wheel drivebicycle having a shared rotational space, according to some embodiments.

FIGS. 7A-7D illustrate a bicycle having a shared drive-and-chassis unit,according to some embodiments.

FIGS. 8A-8F illustrate a bicycle having a drive-and-chassis unit,according to some embodiments.

DETAILED DESCRIPTION

The teachings provided herein are generally directed compact vehicledesigns that can be used in a foldable, carry-on vehicle. The compactdrive mechanisms presented herein, for example, have contributed to theadvent of the compact, carry-on bicycles set-forth in the teachings.

In some embodiments, for example, the teachings are directed to acompact, combination drive-and-steering unit for a vehicle, the unithaving a shared rotational space comprising a portion of a driveassembly and a portion of a steering assembly. The drive assembly caninclude a crankshaft having a crank axis that rotates in a fixedposition relative to a chassis of a vehicle powered by the crankshaft.The crankshaft can be in an operable communication with a spool-shafthaving a drive axis, the spool-shaft in an operable communication with adrive member. The drive member can be in an operable communication witha wheel assembly having a wheel, the drive assembly transferring a powerfrom the crankshaft to drive the wheel. The steering assembly caninclude a strut in an operable communication with the wheel assembly, asteering axle in an operable communication with the strut, and asteering member in an operable communication with the steering axle. Thesteering axle can have a steering axis that is concentric to the driveaxis of the spoolshaft in the shared rotational space, the spoolshaftcircumscribing at least a portion of the steering axle. The steeringaxle can rotate freely, or substantially freely, within the spoolshaft,such that the crankshaft rotates in the fixed position independent, orsubstantially independent, of a rotation of the steering axle. Theshared rotational space creates a compact, combinationdrive-and-steering unit for the vehicle.

The term “a shared rotational space” can refer to a defined area withinthe vehicles and units taught herein, in which at least two componentsrotate together, using the same or different axes of rotation. Forexample, a coaxial drive assembly can be contained in a sharedrotational space. A coaxial drive assembly can include, for example,two, independent power transfer mechanism in one shared rotationalspace. In some embodiments, a first power transfer mechanism can be forsteering the position, or rotational direction, of a first wheel, and asecond power transfer mechanism can be for transferring a drive powerfrom a drive power source to the first wheel as a drive wheel.

The term “a fixed position relative to a chassis of a vehicle” can referto a position of rotation that, once fixed in position, does not changewithin the vehicles and units taught herein. In some embodiments, thefixed position can be adjustable to suit a body type of a user of thevehicle, for example. The term “substantially” is a descriptor that canrefer to an extent to which any deficit, or difference, does notappreciably affect an intended function, action, or use. For example,the term a steering axle that rotates “substantially freely” within aspoolshaft can refer to a steering axle that may have some resistant toits rotation, although the resistance is not enough to appreciablyaffect the intended function, action, or use of the rotation of thesteering axle. Likewise, a rotation of a crankshaft that is“substantially independent” of a rotation of a steering axle can referto a crankshaft rotation that does not appreciably affect the intendedfunction, action, or use of the rotation of the steering axle. In someembodiments, a movement can be substantially free, for example, when thework required to counter a mechanical resistance to the movement is lessthan about 1.0%, 2.0%, 3.0%, 5.0%, 7.0%, 10.0%, 12.0%, 15.0%, 17.0%,20.0%, 25.0%, or 30.0% of the work of required without the resistance.

It should be appreciated that the drive member, in the embodimentsset-forth herein, can be any operable connection that transfers power tothe wheel. In some embodiments, the drive member comprises a linkshaft.In some embodiments, the drive member comprises a chain. And, in someembodiments, the drive member comprises a belt. One of skill willappreciate that a drive member, such as a linkshaft, can also be atelescoping linkshaft to enable additional room for collapse of thevehicle. For example, a vehicle having a collapsible linkshaft thattraverses the C-channel can be telescoping, such that it can collapsewith a concurrent collapse of a telescoping C-channel. Likewise, avehicle having a collapsible linkshaft that traverses as strut can betelescoping, such that it can collapse with a concurrent collapse of atelescoping strut.

It should also be appreciated that the steering member, in theembodiments set-forth herein, can be any means for directing a steeringof the vehicle. In some embodiments, the steering member is a handlebar.And, in some embodiments, the steering member is a steering wheel.Moreover, the steering member may comprise a single handle foradditional space savings, which may be known to those in the art, insome embodiments, as “tiller steering”, for example. Moreover, thesteering member can be collapsible, in order further reduce the volumeof the vehicle in it's collapsed state. For example, a handlebar canhave foldable hingepoints that can be releasably lockable using anymeans known to one of skill. Such means can include, for example, ahinge-and-collar arrangement at the hingepoints, such that the hinge canbe locked in place with the collar. The collar can be mobile orstationary, where an example of a mobile collar can be one that istranslational along the longitudinal axis and locks in place around thehingepoint, for example, using a “twist-and-lock” type of design knownto those of skill. An example of a stationary collar can be one that isfixed in place, such that it is not longitudinally translational, andlongitudinal portion of the stem or handlebar can be longitudinallytranslated in and out of the fixed collar, which can also be atwist-and-lock device. As stated, any such mechanism known to one ofskill may be suitable to the teachings herein.

It should be appreciated that the vehicle, in the embodiments set-forthherein, can be any vehicle that can benefit from the teachings providedherein. In some embodiments, the vehicle will have at least two wheels,three wheels, 4 wheels, or more. In some embodiments, the vehicle cantransform from a two-wheeled vehicle to a three-wheeled vehicle, or evena four-wheeled vehicle, using variations of the same chassis and drivesystem. In some embodiments, the vehicle can include adrive-and-steering unit, a drive-and-chassis unit, or a combinationthereof, such that both drive systems are used in one vehicle. In someembodiments, the vehicle is a bicycle. And, in some embodiments, thevehicle is a folding bicycle. In some embodiments, the vehicle can be atandem bicycle, or even a folding, tandem bicycle. In some embodiments,the vehicle is a tricycle, a pedal truck, a pedal taxi, a pedal cart, agolf cart, a children's toy vehicle, a portabike, and the like.

The chassis of a vehicle will include a structural means to attach atleast two wheels. As such, it should also be appreciated that a strutcan be a structural member used to operably attach a wheel assembly to avehicle chassis. One of skill will appreciate that a strut can include afork. Moreover, in some embodiments, a strut can comprise a unifork.

FIGS. 1A-1C illustrate a front-wheel drive, drive-and-steering unit,according to some embodiments. FIG. 1A illustrates thedrive-and-steering unit 100. A strut 105 encloses, or partiallyencloses, a spoolshaft 110, a linkshaft 115, and a steering axle 120. Acrank 125 is powered by crankarms 130, 131 to turn a crank-bevel-gear135, which turns an idler-bevel-gear 137, which turns a spool shaft 110,which turns a linkshaft 115, which turns a wheel-bevel-gear 140 to turna wheel 150. FIG. 1B shows the rotational forces, where a crank-force135 f produces an idler-force 137 f, which produces a spoolshaft-force110 f, which produces a linkshaft-force 115 f, which finally produces awheel-force 150 f. FIG. 1C is a closer view of forces in thedrive-and-steering unit mechanism.

One of skill will appreciate that the mechanical structure of the driveunits can include any type of gear arrangement known to one of skill. Insome embodiments, the gear arrangement can include a bevel gear. One ofskill will appreciate that a “bevel gear” can be any gear in a geararrangement having a pair of gears with teeth surfaces cut so that theycan connect unparallel gear shafts. In some embodiments, the bevel gearis cut at an angle of about 45°, to allow for gear shafts positionednormal to one another can connect to transfer a power to a wheel asdescribed herein. One of skill will appreciate that any angle of cut canbe used in order to accommodate any relate gear shaft position.

FIGS. 2A and 2B illustrate variations of the drive-and-steering unitmechanism, according to some embodiments. FIG. 2A shows thedrive-and-steering unit 200 with the use of an idler-bevel-gear 237 totransfer power from the crankarms 230,231 to the crank 225 to thelinkshaft 215, which transfers the power to the wheel-bevel-gear 240 toturn wheel axle 255. FIG. 2B illustrates a drive-and-steering unit thattransfers power directly from the crank-bevel-gear 235 to the linkshaft215 to transfer power to the wheel-bevel-gear 240 to turn the wheel 250,which is supported by the strut 205.

The drive-and-steering unit can be powered using any means known to oneof skill. In some embodiments, any means of power that would functionwith the teachings herein can be used to power a drive wheel. In someembodiments, an electric motor can be used to power a drive wheel. And,in some embodiments, one or more electric motors can be used to powerone or more drive wheels. For example, the drive-and-steering unit canfurther comprise an electric motor in an operable communication with thecrankshaft. In another example, the drive-and-chassis unit can furthercomprise an electric motor in an operable communication with thecrankshaft. In another example, one or more drive wheels can have one ormore hubs that comprise an electric drive motor. The electric drivemotor can have a source of power that is external to the chassis orinternal to the chassis. A compact, carry-on vehicle, for example, canhave batteries located in one or more struts, in some embodiments. And,one of skill will appreciate that batteries can also be convenientlylocated in removable cases, such as saddlebags or backpacks, from whichthe batteries can be conveniently re-charged in any location.

FIG. 3 illustrates a drive-and-steering unit in a bicycle, according tosome embodiments. Bicycle 300 has chassis 305 with C-channel 305A, frontstrut 305B, and rear strut 305C. A shared rotational space 310 has aportion of a drive assembly and a portion of a steering assembly. Thedrive assembly can include a pair of pedals 310A attached to a pair ofcrankarms 310B, the pair of crankarms 310B attached to a crankshaft310C, the crankshaft 310C having a crank axis that rotates in a fixedposition under a pedal power relative to the chassis 305. The crankshaft310C can be in an operable communication with a spool-shaft 310D havinga drive axis, the spool-shaft 310D in an operable communication with adrive member, and the drive member 310E in an operable communicationwith a wheel assembly 350 having a wheel. In these embodiments, thedrive assembly transfers the pedal power from the crankshaft 310C todrive the wheel. The steering assembly can include a strut 305B in anoperable communication with the wheel assembly 350, a steering axle 310Fin an operable communication with the strut 305B, and a steering member307 in an operable communication with the steering axle 310F. As such,the crankshaft 310C turns crankshaft-bevel-gear 310G, which turnsidler-bevel-gear 310H, which turns spoolshaft 310D, which turnslinkshaft 310E, which transfers power to the wheel assembly 350. Thesteering axle 310F can have a steering axis that is concentric to thedrive axis of the spoolshaft 310D in the shared rotational space 310,the spoolshaft 310 circumscribing at least a portion of the steeringaxle 310F. The steering axle 310F can rotate freely, or substantiallyfreely, within the spoolshaft 310, such that the crankshaft 310C rotatesin the fixed position independent, or substantially independent, of arotation of the steering axle 310F. And, the shared rotational space 310can create a compact, combination drive-and-steering unit for thepedal-powered vehicle. FIG. 3 also shows a foldable seat 340 having aback 340A and a seat 340B that folds into itself, a rear pivot 303 forthe rear strut 305C. An endcap 306 is used to close the rear portion ofthe C-channel 305A. And, the rear strut 305C is operably attached to arear wheel assembly 360.

The compact drive-and-chassis mechanism can be designed include at leastportion of the chassis. In some embodiments, for example, the teachingsare directed to a compact, combination drive-and-chassis unit for avehicle. The unit comprises a shared chassis space comprising at least aportion of a chassis assembly that encloses at least a substantialportion of a drive assembly. The drive assembly includes a crankshafthaving a crank axis, the crankshaft in an operable communication with adrive member. The drive member can be in an operable communication witha wheel assembly having a wheel, the drive assembly transferring a powerfrom the crankshaft to drive the wheel. The portion of the chassisassembly can function as a protective casing for the substantial portionof the drive assembly, the substantial portion of the drive assemblycomprising the crankshaft and at least a substantial portion of thedrive member. The drive member can have at least one fixably rotatablepivot point corresponding to a fixably rotatable joint in the chassisassembly for at least one re-direction of the power from the crankshaftto the wheel. And, the shared chassis space can create a compact,combination drive-and-chassis unit for the vehicle. The term “fixablyrotatable” can refer to a pivot point that can rotate at least 2degrees, 5 degrees, 10 degrees, 15 degrees, 30 degrees, 45 degrees, 90degrees, 120 degrees, 135 degrees, 180 degrees, 225 degrees, 270degrees, 360 degrees, or any range therein, while also lockable in asingle position for normal use of the vehicle. The rotatable functioncan allow for an adjustment for preference of vehicle configuration orbody type of the user during use of the vehicle, for example. In someembodiments, the rotatable function can be used to collapse the vehiclefor storage or carrying by a user. Likewise the rotatable function canbe used to expand, or open, the vehicle to an operational configurationfor use by the user.

In some embodiments, a substantial portion of the chassis can be, forexample, at least the C-channel. In some embodiments, a substantialportion of the chassis can be, for example, the C-channel and the rearstrut. In some embodiments, a substantial portion of the chassis can be,for example, the C-channel and at least a substantial portion of therear strut. In some embodiments, a substantial portion of the chassiscan be, for example, the front strut. In some embodiments, a substantialportion of the chassis can be, for example, the front strut, theC-channel, and the rear strut. It should be appreciated that a“substantial portion” can be used to refer to the portion of the chassisdesired to cover at least a portion of the mechanical drive components,such that the portion covered inhibits a contact between the user andthe drive components, in accord with some purposes for the systemstaught herein.

In some embodiments, a substantial portion of the drive components canbe, for example, at least the portion positioned in the C-channel. Insome embodiments, a substantial portion of the drive components can be,for example, the portion in the C-channel and the rear strut. In someembodiments, a substantial portion of the drive components can be, forexample, the portion in C-channel and at least a substantial portion ofthe drive components in the rear strut. In some embodiments, asubstantial portion of the drive components can be, for example, theportion located in the front strut. In some embodiments, a substantialportion of the drive components can be, for example, the portion in thefront strut, the C-channel, and the rear strut. It should be appreciatedthat, for this aspect of the teachings, a “substantial portion” can beused to refer to the portion of the chassis or drive components thatcover, or are covered, to inhibit a contact between the user and thedrive components, in accord with some purposes for the systems taughtherein.

In some embodiments, the vehicle can be collapsed for carrying orstorage, or expanded into an operational configuration, without the useof tools. For example, the vehicle can be locked into a collapsed,carry-on configuration that includes releasably lockable fasteners, suchas hooks, screws, bolts, magnets, and the like, wherein no tools areneeded to release and/or lock the vehicle in a desired configuration,whether that configuration be the collapsed or operationalconfiguration. It should be appreciated that such an assembly ofcomponents would facilitate a convenient release from, or collapse into,the carry-on configuration. As such, this ease of use also facilitatesprotection of the user from exposure to grease, dirt, grime, pinch ornip points, and the like. In some embodiments, the release of thevehicle from a collapsed state into an operational state can beperformed with a single push of a button or pull of a trigger, forexample, for ease of transformation and use. Likewise, thetransformation of the bike from an operational state into a collapsedstate can be performed through a single downward push motion of the bikeinto the collapsed state, during which the bike can be releasably lockedinto the collapsed, or carry-on, configuration.

In some embodiments, the vehicles provided herein can have elastomericmaterials positioned, for example, at the point of contact between thestrut and the C-channel to provide the user with shock absorption. Theelastomeric material can be any elastomer known to one of skill assuitable for the mechanical and weight requirements of the systemstaught herein. For example, the weight requirement at each elastomericcomponent can range from about 50 kg to about 1000 kg, from about 400 kgto about 800 kg, from about 30 kg to about 600 kg, from about 50 kg toabout 500 kg, from about 50 kg to about 400 kg, from about 50 kg toabout 300 kg, from about 50 kg to about 250 kg, from about 50 kg toabout 125 kg, from about 50 kg to about 100 kg, or any range therein.One of skill will appreciate that an elastomer or shock absorbancemechanism can be place in a variety of positions on the vehicles taughtherein. In some embodiments, a strut can be designed to include anyshock absorbing design known to one of skill to be suitable for thevehicles taught herein.

The size of a vehicle in a collapsed configuration provides a user withease of storage, carrying, transport, and the like. In some embodiments,for example, the size of the collapsed configuration is equal to orinsignificantly greater than the size of the C-channel used in theassembly of the vehicle. In some embodiments, the size of the collapsedconfiguration is substantially greater than the size of the C-channelbut generally limited to an additional protrusion of wheel diameter orsteering member. In some embodiments, the size of the collapsedconfiguration has a size that is within the standards of many majorairlines, for example, for carry-on luggage. As such, the size of thecollapsed configuration can be designed to meet the standards of mostpublic transportation system limitations. In some embodiments, theoverall length of a collapsed vehicle can range from about 12″ to about24″, about 12″ to about 40″, about 12″ to about 36″, about 12″ to about30″, about 12″ to about 32″, about 12″ to about 34″, about 12″ to about38″, about 14″ to about 24″, about 16″ to about 24″, about 18″ to about24″, and the like. In some embodiments, the overall width of a collapsedvehicle can range from about 4″ to about 8″, about 4″ to about 7″, about4″ to about 6″, about 4″ to about 5″, about 5″ to about 8″, about 5″ toabout 7″, about 5″ to about 6″, about 6″ to about 8″, about 6″ to about7″, about 7″ to about 8″, and the like. In some embodiments, the overallheight of a collapsed vehicle can range from about 6″ to about 12″,about 6″ to about 20″, about 6″ to about 18″, about 6″ to about 15″,about 6″ to about 16″, about 6″ to about 17″, about 6″ to about 19″,about 7″ to about 12″, about 8″ to about 12″, about 9″ to about 12″, andthe like.

The chassis can further comprise a rear strut having a proximal end anda distal end, the proximal end attaching to the remainder of the chassisat a rotatably-lockable rear strut pivot at the fixably rotatable joint,and the distal end operably attaching to the wheel assembly.

As with the combined drive-and-steering unit above, it should beappreciated that the drive member, in the embodiments set-forth herein,can be any operable connection that transfers power to the wheel. Insome embodiments, the drive member comprises a linkshaft. In someembodiments, the drive member comprises a chain. And, in someembodiments, the drive member comprises a belt. Likewise, as with thecombined drive-and-steering unit above, it should be appreciated thatthe steering member, in the embodiments set-forth herein, can be anymeans for directing a steering of the vehicle. In some embodiments, thesteering member is a handlebar. Likewise, as with the combineddrive-and-steering unit above, the vehicle can be any vehicle that canbenefit from the combination drive-and-chassis unit. In someembodiments, the vehicle is a bicycle. And, in some embodiments, thevehicle is a folding bicycle. Moreover, as with the combineddrive-and-steering unit above, it should be appreciated that a strut canbe a structural member that is used to operably attach a wheel assemblyto a vehicle chassis. Again, one of skill will appreciate that a strutcan include a fork and, in some embodiments, a strut can comprise aunifork.

As with the drive-and-steering unit, the drive-and-chassis unit can bepowered using any means known to one of skill. For example, thedrive-and-chassis unit can further comprise an electric motor in anoperable communication with the crankshaft. Likewise, the teachings arealso directed to a compact, combination drive-and-chassis unit for apedal-powered vehicle. In these embodiments, the drive-and-chassis unitcan comprise a shared chassis space comprising at least a portion of achassis assembly that encloses at least a substantial portion of a driveassembly. The drive assembly can include a pair of pedals attached to apair of crankarms, the pair of crankarms attached to a crankshaft. Thecrankshaft can have a crank axis and be in an operable communicationwith a drive member, the drive member in an operable communication witha wheel assembly having a wheel. And, the drive assembly can transfer apedal power from the crankshaft to drive the wheel. In theseembodiments, the portion of the chassis assembly can function as aprotective casing for the substantial portion of the drive assembly, thesubstantial portion of the drive assembly comprising the crankshaft andat least a substantial portion of the drive member. The drive member canhave at least one fixably rotatable pivot point corresponding to afixably rotatable joint in the chassis assembly for at least onere-direction of the power from the crankshaft to the wheel. And, theshared chassis space can create a compact, combination drive-and-chassisunit for the vehicle.

The power can be transferred from the crank to the wheel through a chainset. As such, in some embodiments, the teachings are directed to acompact, combination drive-and-chassis unit for a pedal-powered vehiclethat includes a chain set.

FIGS. 4A-4C illustrate a bicycle having a shared chassis as adrive-and-chassis unit, according to some embodiments. The bicycle 400has a shared chassis space 410 that comprises at least a portion of achassis assembly that encloses at least a substantial portion of a driveassembly. The chassis includes C-channel 405A, front strut 405B and rearstrut 405C The drive assembly can include a pair of pedals 410A attachedto a pair of crankarms 410B, the pair of crankarms 410B attached to acrankshaft 410C. The crankshaft 410C can have a crank axis and a firstsprocket 411. The crankshaft 410C can be in an operable communicationwith a chain set having a roller chain 412A,412B and a second sprocket413 having a second sprocket axis, the chain set in an operablecommunication with a rear wheel assembly 450 having a wheel, and a thirdsprocket 414. And, the drive assembly can transfer a pedal power fromthe crankshaft 410C to drive the rear wheel assembly 450. FIG. 4A alsoshows front wheel assembly 460 a steering axle 410F and handlebars 407,as well as seat back 440A, seat bottom 440B, and seat adjuster 430,431.FIG. 4B shows a cut-away perspective of the drive-and-chassis unit tobetter illustrate the pivot detail where the rear strut 405C attaches tothe C-channel 405A. FIG. 4C illustrates how the fixably rotatablestruts, collapsible seat 440, and removable handlebar 407 and steeringaxle 410F can create a collapsed bicycle 400 for storage or transport.

In some embodiments, the portion of the chassis assembly can function asa protective casing for the substantial portion of the drive assembly,the substantial portion of the drive assembly comprising the crankshaftand at least a substantial portion of the drive member. The chain setcan have a fixably rotatable pivot point at the second sprocket axiscorresponding to a fixably rotatable joint in the chassis assembly for are-direction of the pedal power from the crankshaft to the secondsprocket, and from the second sprocket to the wheel. And, the sharedchassis space can create a compact, combination drive-and-chassis unitfor the vehicle.

The teachings are also directed to any of a variety of bicycles havingthe features discussed above. In some embodiments, the teachings aredirected to a folding bicycle with an enclosed, front-wheel shaft-drive.

FIGS. 5A and 5B illustrate a short-strut, front-wheel drive bicyclehaving a shared rotational space, according to some embodiments. FIG. 5Ashows a bicycle 500 having the shared rotational space 510 including (i)a portion of a drive assembly and (ii) a portion of a steering assembly,as well as a folding chassis 505 with a handle 509 for carrying thebicycle 500 in a collapsed configuration. The folding chassis 505includes (iii) a rotatably-lockable front strut 505B supporting a frontwheel assembly 550 having a front wheel, and (iv) a rotatably-lockablerear strut 505C supporting a rear wheel assembly 560 having a rearwheel. The drive assembly can include a pair of pedals 510A attached toa pair of crankarms 510B, the pair of crankarms 510B attached to acrankshaft 510C. The crankshaft 510C can have a crank axis that rotatesunder a pedal power in a fixed position in the chassis, the crankshaft510C in an operable communication with a spoolshaft 510D having a driveaxis. The spool-shaft 510E can be in an operable communication with adrive member 510E, and the drive member 510E can be in an operablecommunication with the front wheel assembly 550. The drive assembly cantransfer the pedal power from the crankshaft 510C to drive the frontwheel. The steering assembly can include the front strut 505B in anoperable communication with the front wheel assembly 550, a steeringaxle 510F in an operable communication with the front strut 505B, and asteering member 507 in an operable communication with the steering axle510F. The steering axle 510F can have a steering axis that is concentricto the drive axis of the spoolshaft 510D in the shared rotational space,the spoolshaft 510D circumscribing at least a portion of the steeringaxle 510F. The steering axle 510F can rotate freely, or substantiallyfreely, within the spoolshaft 510D, such that the crankshaft 510Crotates in the fixed position independent, or substantially independent,of a rotation of the steering axle 510F. The front strut 505B can have aproximal end and a distal end, the proximal end of the front strut 505Battaching to the chassis 505 at a rotatably-lockable front strut pivot510C. The rear strut 505C can have a proximal end and a distal end, theproximal end of the rear strut 505C attaching to the chassis 505 at arotatably-lockable rear strut pivot 503. And, the shared rotationalspace can create a compact, combination drive-and-steering unit for thepedal-powered vehicle. FIG. 5B illustrates the bicycle 500 in acollapsed configuration for storage or transport, in which the steeringaxle and handlebars retract into the C-channel 505, the front strut 505Band rear strut 505C rotate into the C-channel 505, and the foldable seat540A,540B collapses for a more compact, carry-on bicycle.

In some embodiments, the front strut can be releasably-lockable in aplurality of positions. And, in some embodiments, the rear strut can bereleasably-lockable in a plurality of positions to vary wheel-base orvehicle seat height, for example. Examples of locking positions caninclude, for example 5 degree, 10 degree, 15 degree, 20 degree, 25degree, 30 degree, 35 degree, 40 degree, 45 degree, 50 degree, 55degree, 60 degree, 65 degree, 70 degree, 75 degree, 80 degree, 85degree, and 90 degree positions, or any position in-between in 1 degreeincrements. In some embodiments, the front strut is a unifork, the rearstrut is a unifork that is complementary in shape to the front strut,such that the front strut, the front wheel assembly, the rear strut, andthe rear wheel assembly can collapse into the chassis in a complementaryconfiguration to form a compact, carry-on bicycle.

FIGS. 6A-6D illustrate a long-strut, unifork-type, front-wheel drivebicycle having a shared rotational space, according to some embodiments.FIG. 6A shows a bicycle 600 having the shared rotational space 610including (i) a portion of a drive assembly and (ii) a portion of asteering assembly, as well as a folding chassis 605 with a handle 609for carrying the bicycle 600 in a collapsed configuration. The foldingchassis 605 includes (iii) a rotatably-lockable front strut 605Bsupporting a front wheel assembly 650 having a front wheel, and (iv) arotatably-lockable rear strut 605C supporting a rear wheel assembly 660having a rear wheel. The drive assembly can include a pair of pedals610A attached to a pair of crankarms 610B, the pair of crankarms 610Battached to a crankshaft 610C. The crankshaft 610C can have a crank axisthat rotates under a pedal power in a fixed position in the chassis, thecrankshaft 610C in an operable communication with a spoolshaft 610Dhaving a drive axis. The spool-shaft 610E can be in an operablecommunication with a drive member 610E, and the drive member 610E can bein an operable communication with the front wheel assembly 650. Thedrive assembly can transfer the pedal power from the crankshaft 610C todrive the front wheel. The steering assembly can include the front strut605B in an operable communication with the front wheel assembly 650, asteering axle 610F in an operable communication with the front strut605B, and a steering member 607 in an operable communication with thesteering axle 610F. The steering axle 610F can have a steering axis thatis concentric to the drive axis of the spoolshaft 610D in the sharedrotational space, the spoolshaft 610D circumscribing at least a portionof the steering axle 610F. The steering axle 610F can rotate freely, orsubstantially freely, within the spoolshaft 610D, such that thecrankshaft 610C rotates in the fixed position independent, orsubstantially independent, of a rotation of the steering axle 610F.

The front strut 605B can have a proximal end and a distal end, theproximal end of the front strut 605B attaching to the chassis 605 at arotatably-lockable front strut pivot 610C. The rear strut 605C can havea proximal end and a distal end, the proximal end of the rear strut 605Cattaching to the chassis 605 at a rotatably-lockable rear strut pivot603. And, the shared rotational space can create a compact, combinationdrive-and-steering unit for the pedal-powered vehicle. FIG. 6B providesa closer view of the drive-and-steering unit. FIGS. 6C and 6D illustratethe bicycle 600 in a collapsed configuration for storage or transport,in which the steering axle and handlebars retract into the C-channel605. In addition, the front strut 605B, which is a front unifork, andrear strut 605C, which is a rear unifork are at least substantiallycomplementary to each other in a collapsed configuration. As such, thefront unifork and the rear unifork can rotate into the C-channel 605 ina complementary and overlapping configuration. Moreover, the foldableseat 640A,640B can be designed to collapse onto the C-channel for a morecompact, carry-on bicycle. It should be appreciated that the overlappingand complementary configurations of the struts allow for ahighly-compact, collapsed vehicle system. The term “substantiallycomplementary” can be used to refer to components that, in a collapsedstate or operational state, can be placed in a positional relationshipthat facilitates a compact vehicle composing a volume that is reducedrelative to such a vehicle that has like components that are notsubstantially complementary. In some embodiments the reduction in volumecan be, for example, at least 10%, at least 20%, at least 25%, at least30%, at least 35%, at least 40%, at least 45%, at least 50%, at least55%, at least 60%, at least 65%, at least 70% and, in some embodiments,at least 75%.

In some embodiments, the chassis functions as a protective casing forthe crankshaft, the spool-shaft, and the drive member during anoperation of the bicycle. And, in some embodiments, the chassisfunctions as a protective casing for the crankshaft, the spool-shaft,the drive member, the front strut, the front wheel assembly, the rearstrut, and the rear wheel assembly during a collapse of the bicycle.

In some embodiments, the steering member can be a collapsibly lockablehandlebar. And, in some embodiments, the bicycle can further comprise acollapsibly lockable seat. Moreover, in some embodiments, the bicyclecan weigh less than about 10 pounds. In some embodiments, the bicyclecan weigh less than about 30 pounds, less than about 28 pounds, lessthan about 26 pounds, less than about 24 pounds, less than about 22pounds, less than about 20 pounds, less than about 18 pounds, less thanabout 16 pounds, less than about 14 pounds, less than about 12 pounds,less than about 10 pounds, less than about 8 pounds, or any weighttherein in increments of about 1 pound.

Likewise, a bicycle can have the drive-and-chassis unit. As such, theteachings are also directed to a compact, carry-on bicycle with anenclosed, drive assembly.

FIGS. 7A-7D illustrate a bicycle having a shared drive-and-chassis unit,according to some embodiments. FIG. 7A shows bicycle 700 comprising (i)at least a portion of a chassis assembly that encloses (ii) at least asubstantial portion of a drive assembly, as well as a folding chassis705 including (iii) a rotatably-lockable front strut 705B supporting afront wheel assembly 760 having a front wheel, and (iv) arotatably-lockable rear strut 705C supporting a rear wheel assembly 750having a rear wheel. The drive assembly can include a pair of pedals710A attached to a pair of crankarms 7106, the pair of crankarms 7106attached to a crankshaft 710C. The crankshaft 710C can have a crank axisthat rotates under a pedal power in a fixed position in the chassis 705,the crankshaft 710C in an operable communication with a drive member712A (not shown), and the drive member 712A can be in an operablecommunication with the rear wheel assembly 750, the drive assemblytransferring the pedal power from the crankshaft 710C to drive the rearwheel. The portion of the chassis assembly 705 can function as aprotective casing for the substantial portion of the drive assembly, thesubstantial portion of the drive assembly comprising the crankshaft 710Cand at least a substantial portion of the drive member 712A. The drivemember 712A can have a fixably rotatable pivot point corresponding to afixably rotatable joint in the chassis assembly for a re-direction ofthe pedal power from the crankshaft to the pivot point and from thepivot point to the wheel through drive member 7126 (not shown). Thefront strut 705B can have a proximal end and a distal end, the proximalend of the front strut 705B attaching to the chassis 705 at arotatably-lockable front strut pivot 710C. The rear 705C strut can havea proximal end and a distal end, the proximal end of the rear strut 705Cattaching to the chassis 705 at a rotatably-lockable rear strut pivot703. And, the shared chassis space can create a compact, combinationdrive-and-steering unit for the pedal-powered vehicle.

In some embodiments, the front strut can be releasably-lockable in aplurality of positions. Likewise, in some embodiments, the rear strutcan be releasably-lockable in a plurality of positions. The result ofthe releasably-lockable struts is an adjustable and selectablevariability in wheel base and/or height of the bicycle to adjust forwheel base, chassis height/seat height, as well as to allow for acollapse of the bicycle into a compact, carry-on vehicle. FIGS. 7C and7D illustrate bicycle 700 in a collapsed, compact, carry-onconfiguration.

As with the bicycle having the combination drive-and-steering unit, thefront strut can be a unifork, and the rear strut can be a unifork thatis complementary in shape to the front strut, such that the front strut,the front wheel assembly, the rear strut, and the rear wheel assemblycollapse into the chassis in a complementary configuration to form acompact, carry-on bicycle. Likewise, the chassis can function as aprotective casing for the crankshaft, the drive member, the front strut,the front wheel assembly, the rear strut, and the rear wheel assemblyduring a collapse of the bicycle

Example 1

In some embodiments, a vehicle can be manufactured from roughly a36″×36″ piece of sheet steel or aluminum. It should be appreciated thatalternate chassis materials can include plastic, fiberglass, carbonfiber, or other metal alloys, resins, or combinations thereof.

The vehicle can be a bicycle, for example. Depending on the height ofthe C-channel sides, the sheet is marked, cut and bent into an invertedC-channel with roughly a 6″ wide back and 6″ to 12″ high sides to theC-channel. The top of the channel can be bent to include a lip on eachouter side of the channel to accommodate a sliding seat that is lockablein position for varying rider sizes. Holes are stamped or drilled intothe C-channel to accommodate axles and pivot points, as well as anyother points of attachment. The axles for mounting the struts, forexample, are attached to the C-channel. The wheels are positioned intandem using uni-struts, as opposed to forks, to allow for acomplementary positioning of the front and rear struts during a collapseof the bicycle for storage or transport. A telescoping steering axle andhandlebar set can be used to assist in a tight and compact collapse ofthe bicycle components into the C-channel. It should also be appreciatedthat the transverse cross-section of the “C-channel” can be square incross-section, rectangular in cross-section, generally round incross-section, or generally elliptical in cross section, for thefunction or aesthetics. And, the longitudinal shape can also vary, suchthat the height of the C-channel can be taller in the center than on anend, for example. In some embodiments, the function of the C-channel isto serve as a container for at least the struts and wheel assemblies, ina manner similar to the housing of a jack-knife serving as a containerfor at least the knife blades of the jack-knife. Likewise, the housingof the C-channel and the jack-knife are comparable in that both serve asfunctional and mechanical members during operation of the device inaddition to serving as a container to protect the user from hazards thatwould otherwise be inherent to a similar device that remains uncontainedwhen not in operation.

It should be appreciated that a variety of components can be selected tobuild the bicycle. For example, wheels can range in size from a diameterranging from about 3″ to a diameter of about 24″, from about 4″ to adiameter of about 22″, from about 5″ to a diameter of about 21″, fromabout 6″ to a diameter of about 20″, from about 7″ to a diameter ofabout 19″, from about 8″ to a diameter of about 18″, from about 10″ to adiameter of about 16″, from about 12″ to a diameter of about 14″, fromabout 12″ to a diameter of about 16″, from about 12″ to a diameter ofabout 18″, or any range therein. In some embodiments, the C-channel canbe about 34″×5.5″×14″. In some embodiments, the length of the C-channelcan range from about 20″ to about 40″, from about 24″ to about 40″, fromabout 18″ to about 36″, from about 18″ to about 32″, from about 32″ toabout 40″, from about 32″ to about 38″, from about 34″ to about 40″,from about 32″, about 33″, about 34″, about 35″, about 36″, about 37″,about 38″, about 39″, about 40″ or any length therein. In someembodiments, the width of the C-channel can range from about 3″ to about6″, from about 4″ to about 6″ from about 3″ to about 5″, about 3″, 4″,5″, 6″, or any width therein. In some embodiments the height of theC-channel can range from about 4″ to about 14″, from about 4″ to about12″, from about 5″ to about 14″, about 4″, 5″, 6″, 7″, 8″, 9″, 10″, 11″,12″, 13″, 14″, or any height therein.

It should also be appreciated that any manufacturing process known toone of skill can be used to manufacture the components taught herein,including forging, casting, extruding, and the like. And, any materialconsidered suitable by one of skill in the teachings herein can be used,as well as any fastening, welding, or bonding process that one of skillwould considered suitable for the teachings provided herein.

FIGS. 8A-8F illustrate a bicycle having a drive-and-chassis unit,according to some embodiments. FIGS. 8A and 8B illustrate front and sideviews of the bicycle 800. FIG. 8C illustrates a bottom view of thebicycle 800 in an open, operational configuration. FIG. 8D illustratesthe bottom view of the bicycle 800 in a compact, collapsedconfiguration. FIG. 8E illustrates a cross-sectional rendering of thebicycle 800 in a partially collapsed configuration. FIG. 8Fillustrations a side view of the bicycle 800 in a compact, collapsedconfiguration with all components collapsed and protected by theC-channel. In some embodiments, an additional feature of having skirtson each side of the C-channel that are long-enough to cover the entirediameter of the wheels, is that the bottom edges of the skirt can alsofunction as a support base, allowing the collapsed vehicle to standalone without additional support.

As described above, the vehicle can be motorized, in some embodiments.Likewise, one of skill will appreciate that there are multi-gear systemsavailable that can be implemented in the vehicle. For example, such asmulti-gear hub assemblies can replace traditional derailer-typeassemblies and, in some embodiments, can be obtained from Nupace, Inc.,Winston-Salem, N.C., USA.

Example 2

The vehicle can be manufactured and purchased as a kit that providesflexibility the type of vehicle, such that the vehicle can betransformed for additional uses. For example, the kit can comprise (i)three struts; (ii) a C-channel, (iii) a drive-and-steering unit; (iv) adrive-and-chassis unit; (v) a collapsible steering member; (vi) acollapsible seat; (v) a hub-motor; (vi) a battery set for the hub motor;(vii) a case for the battery set; (viii) a multi-gear hub; (ix) autility box or deck for transporting items; (x) a tandem extension foran additional passenger; (xii) a harness for a hands-free carrying ofthe vehicle, or some combination thereof.

The kits could also come with instructions for assembly of the vehiclesinto various transformation modes. And, optionally, the kits could comewith software, or other digital media, that may facilitate teaching auser how to operate and construct the systems.

The kits can be offered to provide much additional utility by offeringthe additional components. Having three struts allows for atransformation of a bicycle into a tricycle. Having the two differentdrive units allows for a transformation of one type to another, or useof both types. Having a hub motor allows for use of the vehicle bypersons that would prefer, or require, motorized assistance in poweringthe vehicle, a transformation that would be useful for disable persons.Having a case for the battery set for an electric motor would alsofacilitate the re-charging of the batteries. The multi-gear hub wouldallow for use of the vehicle with a variety of gear ratios to betterutilize drive power, whether human pedal power or electric motor power.The utility box or deck would allow for use of the vehicle as a workvehicle, and the tandem extension would allow for additional passengers,such as a child.

One of skill reading the teachings will appreciate that the concepts canextend into additional embodiments that go well-beyond a literal readingof the claims, the inventions recited by the claims, and the termsrecited in the claims. It will be appreciated that the terms “operable,”“configured,” and like terms, can be used in connection with a functionof the systems, components, or parts of the systems taught herein, suchthat the systems, components, or parts can be operable to function in aspecified manner or configured to operate or function in a specifiedmanner. Likewise, the phrase “operably attached to,” “operablyconfigured with,” “in operable contact with,” “in operable communicationwith,” and like terms, can be used with to describe functionalinterrelationships between and within the vehicles, units, components,and the like, in the teachings provided herein. Such interrelationshipscan be direct, or indirect, such that an operable relationship can occurvia a plurality of components that function together.

We claim:
 1. A folding vehicle with an enclosed, front-wheelshaft-drive, comprising: a shared rotational space including (i) aportion of a drive assembly and (ii) a portion of a steering assembly;and, a folding chassis including (iii) a rotatably-lockable front strutsupporting a front wheel assembly having a front wheel, and (iv) arotatably-lockable rear strut supporting a rear wheel assembly having arear wheel; wherein, the drive assembly including a pair of pedalsattached to a pair of crankarms, the pair of crankarms attached to acrankshaft, the crankshaft having a crank axis that rotates under apedal power in a fixed position in the chassis, the crankshaft in anoperable communication with a drive member, the drive member in anoperable communication with the front wheel, the drive assemblytransferring the pedal power from the crankshaft to drive the frontwheel; and, the steering assembly including the front strut in anoperable communication with the front wheel assembly, a steering axle inan operable communication with the front strut, and a steering member inan operable communication with the steering axle; wherein, the frontstrut has a proximal end and a distal end, the proximal end of the frontstrut attaching to the chassis at a rotatably-lockable front strutpivot; the rear strut has a proximal end and a distal end, the proximalend of the rear strut attaching to the chassis at a rotatably-lockablerear strut pivot; the shared rotational space creates a compact,combination drive-and-steering unit for the pedal-powered vehicle; and,the releasably-lockable front strut and the releasably-lockable rearstrut are configured to fold into a complementary configuration with theremainder of the folding chassis in a collapsed state.
 2. The vehicle ofclaim 1, wherein the front strut is releasably-lockable in a pluralityof positions.
 3. The vehicle of claim 1, wherein the rear strut isreleasably-lockable in a plurality of positions.
 4. The vehicle of claim1, wherein the front strut is a unifork, the rear strut is a uniforkthat is complementary in shape to the front strut, such that the frontstrut, the front wheel assembly, the rear strut, and the rear wheelassembly collapse into the chassis in a complementary configuration toform a compact, carry-on bicycle.
 5. The vehicle of claim 4, wherein thechassis functions as a protective casing for the drive assembly duringan operation of the bicycle.
 6. The vehicle of claim 4, wherein thechassis functions as a protective casing for the drive assembly during acollapse of the bicycle.
 7. The vehicle of claim 4, wherein the drivemember comprises a shaft operably connected to the front wheel totransfer power from the crankshaft to the front wheel.
 8. The bicycle ofclaim 4, wherein the drive member comprises a chain operably connectedto the front wheel to transfer power from the crankshaft to the frontwheel.
 9. The bicycle of claim 4, wherein the drive member comprises abelt operably connected to the front wheel to transfer power from thecrankshaft to the front wheel.
 10. A folding bicycle with an enclosed,front-wheel shaft-drive, comprising: a shared rotational space including(i) a portion of a drive assembly and (ii) a portion of a steeringassembly; and, a folding chassis including (iii) a rotatably-lockablefront strut supporting a front wheel assembly having a front wheel, and(iv) a rotatably-lockable rear strut supporting a rear wheel assemblyhaving a rear wheel; wherein, the drive assembly including a pair ofpedals attached to a pair of crankarms, the pair of crankarms attachedto a crankshaft, the crankshaft having a crank axis that rotates under apedal power in a fixed position in the chassis, the crankshaft in anoperable communication with a shaft in an operable communication withthe front wheel, the drive assembly transferring the pedal power fromthe crankshaft to drive the front wheel; and, the steering assemblyincluding the front strut in an operable communication with the frontwheel assembly, a steering axle in an operable communication with thefront strut, and a steering member in an operable communication with thesteering axle; wherein, the front strut has a proximal end and a distalend, the proximal end of the front strut attaching to the chassis at arotatably-lockable front strut pivot; the rear strut has a proximal endand a distal end, the proximal end of the rear strut attaching to thechassis at a rotatably-lockable rear strut pivot; the shared rotationalspace creates a compact, combination drive-and-steering unit for thepedal-powered vehicle; and, the releasably-lockable front strut and thereleasably-lockable rear strut are configured to fold into acomplementary configuration with the remainder of the folding chassis ina collapsed state.
 11. The bicycle of claim 10, wherein the front strutis releasably-lockable in a plurality of positions.
 12. The bicycle ofclaim 10, wherein the rear strut is releasably-lockable in a pluralityof positions.
 13. The bicycle of claim 10, wherein the front strut is aunifork, the rear strut is a unifork that is complementary in shape tothe front strut, such that the front strut, the front wheel assembly,the rear strut, and the rear wheel assembly collapse into the chassis ina complementary configuration to form a compact, carry-on bicycle. 14.The bicycle of claim 10, wherein the chassis functions as a protectivecasing for the drive assembly during an operation of the bicycle. 15.The bicycle of claim 10, wherein the chassis functions as a protectivecasing for the drive assembly during a collapse of the bicycle.
 16. Acompact, carry-on bicycle with an enclosed, front-wheel shaft-drive,comprising: a shared rotational space including (i) a portion of a driveassembly and (ii) a portion of a steering assembly; and, a foldingchassis including (iii) a rotatably-lockable front strut supporting afront wheel assembly having a front wheel, and (iv) a rotatably-lockablerear strut supporting a rear wheel assembly having a rear wheel;wherein, the drive assembly including a pair of pedals attached to apair of crankarms, the pair of crankarms attached to a crankshaft, thecrankshaft having a crank axis that rotates under a pedal power in afixed position in the chassis, the crankshaft in an operablecommunication with a shaft in an operable communication with the frontwheel, the drive assembly transferring the pedal power from thecrankshaft to drive the front wheel; and, the steering assemblyincluding the front strut in an operable communication with the frontwheel assembly, a steering axle in an operable communication with thefront strut, and a steering member in an operable communication with thesteering axle; wherein, the front strut has a proximal end and a distalend, the proximal end of the front strut attaching to the chassis at arotatably-lockable front strut pivot; the rear strut has a proximal endand a distal end, the proximal end of the rear strut attaching to thechassis at a rotatably-lockable rear strut pivot; the front strut is aunifork, the rear strut is a unifork that is complementary in shape tothe front strut, such that the front strut, the front wheel assembly,the rear strut, and the rear wheel assembly collapse into the chassis ina complementary configuration to form a compact, carry-on bicycle; theshared rotational space creates a compact, combinationdrive-and-steering unit for the pedal-powered vehicle and, thereleasably-lockable front strut and the releasably-lockable rear strutare configured to fold into a complementary configuration with theremainder of the folding chassis in a collapsed state.
 17. The bicycleof claim 16, wherein the front strut and the rear strut arereleasably-lockable in a plurality of positions.
 18. The bicycle ofclaim 16, wherein the chassis functions as a protective casing for thedrive assembly during an operation of the bicycle.
 19. The bicycle ofclaim 16, wherein the chassis functions as a protective casing for thedrive assembly during a collapse of the bicycle.
 20. The bicycle ofclaim 16, wherein the bicycle weighs less than 10 pounds.